Spoke to the SKY fibre team. A lot of recent orders went through as 40/2 when they shouold have been 40/10. All 40/2 connections are being changed in batches to 40/10. Well lets see what happens over the next 2-3 weeks..

Sky often connect lines at 40 / 2 as this was the original Sky fibre speed.

The system then moves you over to 40 / 10 eventually.

It works in the same way that SKY DLM often starts at 4Mbps. Although it's not a day 10 training as such.
The better speeds require a modem reboot which can often mean people have slower upload for weeks / months before rebooting the modem.

I wonder if it costs Sky money to get Openreach to provision at 2meg upload and then later submit an order to Openreach for 10meg upload.

Does seem a rather daft thing for Sky to do.

I was told the SKY ordering systems were still using the 40/2 for the initial order and then a batch process was converting them thereafter. Could be some area's can only handle 40/2 without causing an error and hence the 2nd stage to ask for 40/10.